Internal combustion engine



Feb.. 9, 1932. F, J. oMo 1,844,478

INTERNAL COIBUTION ENGINE Filed April 26, 1928 2 Sheets-ShawnV 1 f* aeg. 1.

F'nmlr J. Oma,v

Feb. 9, 1932. F. J. oMo

INTERNAL COMBUSTION ENGINE Filed April 26o l928 2 Sheets-Sheet 2 Frank J. OnuJ hxv akkor ua' lt'atentetl lieh, 9, 1932 PATENT OFFICE FRALNK J. OMI, OF NEW YORK, N. Y.

INTERNAL COMIBUS'I'ION' ENGINE .Application filed April 2%,

` provide a four-cycle internal combustion engine in Which the horse power is materially :increased Without increasing the Weight of fdltl till the engine.

llinother object is to furnish an internal combustion engine of the opposed piston type, in Which the enter ends of the cylinders are open to tacilitate Cooling ot' the cylinder, piston and valve.,

rlinother object of the invention is to pro vide a tour-cycle internal combustion engine ot the opposed piston type, in Which the router end ot' the cylinder is-open, and in `Which a sleeve valve is ar'anged between the opposed pistons and the cylnder, to control the admission of an explosive mixture to the combustion Chamber, and to discharge the eirhaost gases trom said Chamber.

lt still itnrther object is to furnish an internal combustion engine ot' this type, With novel means for torcing an explosive mixture into the combustion Chamber under super-atinospheric pressure.

ft iturther object is to provide an internal combustion engine of this character, With novel means for transmitting the power from 'the pistons to the engine shaft.

llfith the .toregoing objects outlined and With other objects in view Which Will appear u as the description proceeds, my invention consists in the novel features hereinafter deu scribed in detail, illustra'ted in the accompanying dravvings, and more particularly pointed out in the appended claims.

Heterring to the drawings,

lFig'. 'l is a vertical longitudinal sectional view ot a multi-cylinder tour-Cycle engine in 'Which my invention is embodied.

.2 is a vertical sectional view taken on line 2-2 of Fig. 1. A

ll'ig. 3 is a transverse section on the line ot lFig'. 2.

lln the dravvings, ldesignates the Crank case having bearings 2, in Which the engine ahaitt 3 revolves. ll designatcs a fly-WheeL The cylinders 5 are mounted on this case,

1923. Serial NO. 272,958.

and connected to the latter by any suitable means such as screws 6. Each Cylinder in the present invention has its outer or upper end open, as shown at 7, and a removable ring 8 nay also be located at the top of each cylinder.

A sleeve valvc 9 is movably mounted in each cylinder to control the intake and exu haust, and 1 prefer to arrange each Valve so that it may rotate relatively to the cyl inder with Which it is associated. To this end, eacn Valve is provided at its upper end With an annular outwardly extending flange 10 Which engages upper and lower annular rows ot' ball bearings or the like 11 and 12. This provides an anti-fricton bearing for the sleeve, and allows the same to readily rotate.. For the purpose of rotatin the valves, each sleeve has a gear 13 near its lower end, which meshes With a Worm gear 14 on a Valve operating shaft 15, Whchimay be driven from the shaft 3 by any suitable means, such as a sprocket chain 16.

Each sleeve has a circumferentially extending or horizontally disposed elongated slot 17, designed to iirst register with the intake pipe 18, and later, With the exhaust pipc 19 as the Valve rotates. These Dipes are connected to diametrically opposite sides of each cyhnder, and the elongated Construction of the port 17 allows a full charge of fuel to be forced into each cylinder on each cycle, and also a complete exhaustion of the spent gases during each Cycle.

A pair of opposed pistons 20 and 21 s arrangedin each cylinder, and the pston 20 forms the uppcr or outer one of each par. This piston conprises a head 22 and a depending skirt 23, the latter fornng a sleeve in which the piston 21 recprocates. The skirt is provided with a pairpf ports 24, elongated lengthvvise of the cylnde and con operating With the port 17 to adnt the eX plosive mixtu'e into the combuston Chamber, or to discharge the exhaust gases from sad Chamber.

The piston 20 is provided With packng rings 25, and the piston 21 has packing rings 26 for sealing the Combuston Chamber.

In order to transmit movement from the pistons to the shaft 3, each of the pistons 21 is provided With upper and lower pairs of rollers 27 and 28, Which roll on cam tracks 29, preferably of elliptical shape, and carried by Webs 30, fast 011 the shaft 3.

Similar pairs of rollers 31 and 32 are mounted on the lower end of the skirt of each of the pistons 20, and these rollers roll on the inner and outer faces of substantially elliptical cam tracks 33, integral With Webs 34, also fast on the shaft 3. The intermediate one of the Webs l have marked 35 for convenience, and it Will be noted that this particular Web has a pair of oppositely extending cams 33 to take care of the rollers of the pistons 20 of adjacent ylinders. 4

For the purpose of disclosing the invention, l'have illustrated the same as applied to a two-cylinder engine, and consequently, the cams are properly arranged to accommodate such an engine, but it Will be obvious to those skilled in the art, that When my invention is applied to an engine having more than two cylinders, the cams will be positioned to properly take care of such an ene. g hn ordinary carburetor 36 is connected to the intake manifold 18, and theair admission port of the carburetor is connected to a compressed air conveying pipe 37, which leads from a blower or compressor 38, mounted on the shaft 3. While the engine is in action, air Will be forced by the blower 38 through the carburetor, and each time the port 17 registers with the port 24, shown at the left hand side of Fig. 2, an explosive mixture will be forced into the combustion chamber. As the sleeve Valve rotates, it Will gradually close the end of the pipe 18, and then the pistons in moving toward one another, Will compress the mixture. When maximum Compression is reached, the charge will be ignited by a spark plug 39, arranged in the top 22 of the outer piston, and the consequent explosion Will force the pistons apart and thereby cause the rollers to rotate the cams and the shaft 3. About the time the pistons reach the outer ends of their strokes, the port 17 Will come into register With the exhaust pipe 19, and then, as the pistons move toward one another on the exhaust Stroke, the spent gases will be forced through one of the ports 24, port 17 and pipe 19.

For the purpose of controlling the-ignition, a timer or distrbutor 40 may be mount-ed on the frame of the engine, and be driven from the shaft 15, and Wires 41 may lead from this distrbutor to the spark plugs.

It Will be noted that the pistons 20 in reciprocating, will draw air into the upper end of each cylinder, and in this way, the air will be circulated for the purpose of cooling the cylinders.

It is believed that those skilled in the art may readily understand the Construction, op-

League eration and advantages of the invention from the foregoing description, and it is obvious that changes may be made in the details disclosed, without departing from the spirit of the invention as expressed in the claims.

What I claim and desire to secure by Letters Patent is: 1. An internal combustion engine, including an open-ended cylinder, a ported sleeve Valve movably mounted in the cylinder, opposed pistons arranged to reciprocate Within the sleeve, one of said pistons having a ported skirt in Which the other piston slides, a shaft, and means for imparting movements of the pistons to the shaft.

2. In an internal combustion engine, an open-ended cylinder having intake and exhaust ports, a sleeve Valve movably mounted in the cylinder and having a port of greater length than the width of either of the intake or exhaust ports, opposed pistons arranged to recprocate Within the sleeve, one of said pistons having a skirt in Which the other piston slides, said skirt having a pair of ports to cooperate With the ports of the sleeve and cylinder, a shaft, and means for transmitting the movements of the pistons to the shaft.

4 3. An internal combustion engine, including an open-ended cylinder, a sleeve Valve movably mounted in the cylinder, an intake port and an exhaust port in the cylinder, an elongated port in the sleeve Valve having a greater length than the Width of either the intake port or exhaust port, opposed pistons arranged to reciprocate in the sleeve Valve, one of said pistons having a skirt in Which the other piston slides, a pair of axially elongated ports in said skirt arranged to cooperate with the ports of the cylinder and sleeve, a shaft, and means for transrnitting movements of the pistons to the shaft.

4. An internal combustion engine, includng an open-ended cylinder, a sleeve Valve rotatably mounted in the cylinder, an intake port and an exhaust port, in the Wall of the cylinder, an elongated horizontally disposed port in the wall of the sleeve Valve, and of greater length than the Width of either the intake port or exhaust port, opposed pistons arranged to reciprocate in the sleeve Valve, one Of said pistons having a skirt in Which the other piston reciprocates, ports in the skirt elpngated lengthwise of the skirt and cooperating With the other ports, a shaft and means for transmitting movements of -the pistons to the shaft.

5. In an internal combustion engine, an open-ended cylindei` having intake and exhaust ports, a sleeve Valve movably mounted in the cylinder and having a port adapted to register With the ports of the cylinder, opposed pistons arranged to reciprocate in the sleeve Valve, one of said pistons having a skirt and the other piston'reciprocatin within the skirt, ports in the skirt elongate iengthwise of the skirt and arrange to cooperat-e 'with the ports of the Valve and cylinder, a shaft, and means for imparting movement from the pistons to the shaft.

5 In an internal combustion engine, opencnded cylinde's, intake and exhaust ports 'for each cyiinde', a sleeve Valve rotatably :mount-ed in each cylinder and having a port adapted to register With the intako and exw ,haust Ports of that cylinder, opposed pistons arranged in each of said sleeves, one piston of each pain having a skirt in which the other' piston slides, each of said skirts having elongated Ports, a shaf, and means for transmit- M 'king movements of 'the pistons to the shaft.

FRANK J OMO. 

